If you notice the backpack sagging below your behind, there may be too much weight in the backpack or you may need to get a backpack that has a reinforced bottom so it does not sag.
If you cut the material, melt the folded area with a lighter. [2] X Research source
The frays of the strap will melt into a single, thicker layer, which is too big to fit through the plastic adjustment mechanism. This will keep the rest of the strap from pulling through the adjustment mechanism.
If you notice there are other straps on your backpack that are unnecessarily long, you can use this method to fold the straps.
